40208680 has 16 divisors (see below), whose sum is σ = 90469620. Its totient is φ = 16083456.

The previous prime is 40208657. The next prime is 40208713. The reversal of 40208680 is 8680204.

It can be written as a sum of positive squares in 2 ways, for example, as 36264484 + 3944196 = 6022^2 + 1986^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 502569 + ... + 502648.

Almost surely, 2^40208680 is an apocalyptic number.

40208680 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40208680 is an abundant number, since it is smaller than the sum of its proper divisors (50260940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40208680 is a wasteful number, since it uses less digits than its factorization.

40208680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005228 (or 1005224 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 40208680 is about 6341.0314618365. The cubic root of 40208680 is about 342.5888877219.

Adding to 40208680 its reverse (8680204), we get a palindrome (48888884).

The spelling of 40208680 in words is "forty million, two hundred eight thousand, six hundred eighty".